TestRail API - Failing result update for individual test steps

From my application, I am submitting the results for individual test steps to TestRail via the add_result_for_case API method. while submitting I am not getting any error response from the API but the testrail individual steps are not getting updated. This is how my JSON format.

{
  "status_id": 1,
  "comment": "This test passed",
  "custom_steps_separated": [
    {
      "content": "Step 2",
      "status_id": 1
    },
    {
      "content": "Step 3",
      "status_id": 1
    }
  ]
}